Chlorine dioxide (ClO₂) is used for disinfection of water and pollutant control. Recently it was shown that free available chlorine (FAC) is formed during the oxidation of organic compounds with ClO₂. To investigate the moieties in natural organic matter (NOM) responsible for the FAC formation, reactions of ClO₂ with phenols and olefins were investigated. Thereby primary yields of the inorganic by-products chlorite, chloride, FAC, and chlorate were determined and compared with Suwannee River natural organic matter (SRNOM). The reaction of ClO₂ with the studied model compounds (vanillin, hydroquinone, indigotrisulfonate, and dimedone) revealed very different inorganic by-products. The main inorganic by-product of all investigated compounds was chlorite (>50% per consumed ClO₂). Besides chlorite, vanillin formed 35% chloride and 4% chlorate, indigotrisulfonate 25% chloride, 7% FAC and 3% chlorate and dimedone 50% chloride and 4% chlorate. Hydroquinone formed exclusively chlorite (90%). Yields of FAC formed by ClO₂ oxidation of SRNOM were significant (22%), which principally could result in halogenated organic by-products. Additionally, chlorite (63%), chloride (8%) and chlorate (5%) were formed. The yield of FAC decreased significantly after pre-ozonation, which can be explained by ozone induced formation of poly-hydroxylated aromatic compounds, which may mainly form chlorite in analogy to hydroquinone.

中文翻译：

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二氧化氯与有机物的反应–形成无机产物

二氧化氯（ClO ₂）用于消毒水和控制污染物。最近显示，在有机化合物与ClO ₂的氧化过程中形成了游离有效氯（FAC）。为了研究负责FAC形成的天然有机物（NOM）部分，研究了ClO ₂与酚和烯烃的反应。从而确定了无机副产品亚氯酸盐，氯化物，FAC和氯酸盐的主要收率，并将其与Suwannee河天然有机物（SRNOM）进行了比较。ClO ₂的反应所研究的模型化合物（香兰素，对苯二酚，吲哚并磺酸和二甲酮）显示出非常不同的无机副产物。所有研究的化合物的主要无机副产物都是亚氯酸盐（每消耗的ClO ₂大于50％）。除亚氯酸盐外，香兰素还形成了35％的氯和4％的氯酸盐，靛蓝磺酸钠25％的氯，7％的FAC和3％的氯酸盐以及二甲酮50％的氯和4％的氯酸盐。对苯二酚仅形成亚氯酸盐（90％）。ClO ₂形成的FAC的产率SRNOM的氧化非常明显（22％），这主要可能导致卤化有机副产物。另外，形成亚氯酸盐（63％），氯化物（8％）和氯酸盐（5％）。预臭氧化后，FAC的产率显着下降，这可以用臭氧诱导形成的多羟基化芳族化合物来解释，该化合物可能与氢醌类似地主要形成亚氯酸盐。